Patent US4078948A successfully refreshed from Google Patents.
US4078948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixing method
Assignee: Xerox Corp
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Filing: 1976-03-01
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Granted: 1978-03-14
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Expires: 1996-03-01
Abstract
Abstract Polymer fluids having oxidizable side chains are used on fusing devices in photocopiers to fix particulate thermoplastic toner to a substrate while the toner is in a fused state. Typical polymers are the polysiloxanes having oxidizable alkyl side chains. The polymers can be continuously applied in minimal thicknesses on the fusing device to form a thermally stable, renewable, self-cleaning layer having excellent toner release properties.
Inventors
- 👤 Arthur C. Martellock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:04
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
139 words
A method of fusing electroscopic thermoplastic resin toner images to a substrate including the steps of: (a) forming a film on a heated fuser member in an electrostatic reproducing apparatus, said film being a barrier to electroscopic thermoplastic resin toner and comprising the product resulting from the interaction of the fuser member and a polysiloxane having at least one thermally oxidizable alkyl group per molecule which interacts with the fuser member surface, said polysiloxane having at least one oxidizable alkyl group per molecule being fluid at the temperature of the fuser member and acting as a release fluid film for the electroscopic thermoplastic resin toner; (b) contacting the toner images on said substrate with the coated, heated fuser member for a period of time sufficient to soften the electroscopic thermoplastic resin toner; and (c) allowing the toner to cool.
Claim 2
Independent Claim
139 words
A method of fusing electroscopic thermoplastic resin toner images to a substrate including the steps of: (a) forming a film on a heated fuser member in an electrostatic reproducing apparatus, said film being a barrier to electroscopic thermoplastic resin toner and comprising the product resulting from the interaction of the fuser member and a polysiloxane having at least one thermally oxidizable alkyl group per molecule which interacts with the fuser member surface, said polysiloxane having at least one oxidizable alkyl group per molecule being fluid at the temperature of the fuser member and acting as a release fluid film for the electroscopic thermoplastic resin toner; (b) contacting the toner images on said substrate with the coated, heated fuser member for a period of time sufficient to soften the electroscopic thermoplastic resin toner; and (c) allowing the toner to cool.
Claim 3
Dependent Claim
43 words
The method of claim 1 comprising continuously depositing the polysiloxane having at least one oxidizable alkyl group per molecule on the heated fuser member to maintain a toner barrier coating and fluid toner release film of at least about 0.5 micron in thickness.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the thickness of the film is maintained at about 1 to about 4 microns.
Claim 5
Dependent Claim
14 words
The method of claim 1 comprising fusing the electroscopic thermoplastic resin toner to paper.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said polysiloxane is applied to a fuser member having a copper surface.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said polysiloxane is applied to a fuser member having a steel surface.
Claim 8
Dependent Claim
18 words
The method of claim 1 wherein said polysiloxane is applied to a fuser member having an aluminum surface.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein said polysiloxane is applied to a fuser member having a glass surface.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein at least one thermally oxidizable alkyl group comprises two or more carbon atoms.
Claim 11
Dependent Claim
25 words
The method of claim 1 wherein the polysiloxane comprises at least one thermally oxidizable alkyl group having from about 3 to about 22 carbon atoms.
Claim 12
Dependent Claim
12 words
The method of claim 4 wherein the polyalkylsiloxane fluid is a polymethylalkylsiloxane.
Claim 13
Dependent Claim
12 words
The method of claim 1 wherein the polyalkylsiloxane fluid is a polyarylalkylsiloxane.
References Cited (Backward Citations)
US3937637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |